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Question
Which of the following distance-time graphs shows a truck moving with speed which is not constant?
Which of the following distance-time graphs shows a truck moving with speed which is not constant?
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Solution
The correct option is D
Speed is constant when an object covers equal distance in equal interval of time.
The graph having horizontal line represents that the object is at rest as the distance is not changing at all.
The other two graphs having a straight line represents constant non-zero speed as equal distance is covered in equal interval of time.
In the curved graph, unequal distance is travelled in equal intervals of time. Hence the truck does is not moving with a constant speed in this case. This is a case of non-uniform motion.
Speed is constant when an object covers equal distance in equal interval of time.
The graph having horizontal line represents that the object is at rest as the distance is not changing at all.
The other two graphs having a straight line represents constant non-zero speed as equal distance is covered in equal interval of time.
In the curved graph, unequal distance is travelled in equal intervals of time. Hence the truck does is not moving with a constant speed in this case. This is a case of non-uniform motion.
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